Python 2 had its final major release in 2010 with the release of Python 2.7 and it will only be bug fixes from here. Python 3 itself is currently at 3.4 with 3.5 to release next year.

There's more to Python than Hello World! but as the saying goes, learn to walk before you run, we got to build on the concepts behind a language, before we think of building with it.